Jim Allchin, Microsoft co-president in a telephone conference made that statement that Windows Vista more secure than XP SP2. There are new security features that could not be added to XP SP2, due to architecture incompatibilities.
The two main features discussed were parental controls, and something they are calling Address Space Layout Randomization. The parental controls only allow the user to download things from Web sites the parents authorize. Prehaps more interesting to the security community is the ASLR.
With ASLR, the object code of system kernel is renedered differently each time to "thwart" malicious code. Allchin states that by doing this, there is only a small probably of a success rate of a worm transferring from one machine to another.
For more information please read:Allchin Suggests Vista Won't Need Antivirus
Windows Vista Won't require an Antivirus
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